Box.



F. A. REBENTISGH.

BOX.

APPLICATION FILED JULY 17, 1909.

953,290. Patented Mar.29, 1910.

' W/fwerrer @FFIQE.

FRIEDRICH ADOLF REBENTISGH, or IMMIGRATH, GERMANY, ASSIGNOR 'ro ALBERT STAHN, or HANOVER, GERMANY.

BOX.

Specification of Letters Patent.

Patented Man. 29, tom.

To all whom it may concern:

Be it known that I, FRIEDRICH AnoLF REBENTIscH, a subject of the Emperor of Germany, residing at Immi ath, Itheinland, Germany, have invented certain new and useful Improvements in Boxes, of which the following is a specification.

This invention relates to the manufacture of boxes and its object is to provide box-lids and box-bottoms, each made in one piece which can. be folded flat when detached from the body of the box, and adapted to make tight joints with the walls of the box by virtue of natural elasticity or springiness of the'material.

The invention consists in part in the manner of folding the blanks from which the lids and bottoms are made, and in part in the provision of means for the engagement of the said lids and bottoms with the walls of the box.

Constructions embodying these improvements are shown in theaccompanying drawing.

Figure 1 is a perspective elevation of a box, with the lid partly raised. Fi 2 7 shows the manner in which the lid and ottom of the box are folded. Fig. 3 is a perspective elevation of a box Without lid, and Fig. 4: an elevation of a part adapted to serve either as the bottom or as the lid of the said box. Fig. 5 is a plan-view of the blank from which the lid or bottom is made, and Fig. 6 a plan-view of the same, folded.

\ Fig. 7 1s a section on the line A-B of Fig.

6, and Fig. 8 a vertical section of a box with the lid closed down. In Fig. 1, a represents the bottom, and b the lid, of the box 0. In making the lid 11 from a flat blank, cut to suitable shape, the material is folded along lines ww parallel with the edges of the blank. Parts 72. h of the inwardly folded portions are then again folded outward along lines yy upon the parts 9, into horizontal positions as indicated by dotted lines h The tendency of the material is to retain approximately the shape imparted to it by the folding. If, therefore, the flangearts 72. are bent downward into the vertica positions indicated by solid lines in Fig. 2, they have a natural tendency to spring outward again. This tendency is utilized for producing a tight joint between the lid and walls of the box a, the flanges I). being inserted into the box,

against the walls of which they are elastically pressed. The flange 72, at one edge of the lid may be fixed to the box by means of adhesive, or other means; in this case the function of the fixed flange k is analogous to that of the strap of a hinge.

Thebottom a is made in exactly the same manner as the lid 6, but in most cases it is, of course, preferable to permanently fasten all the flanges of the bottom to the walls of the box.

Instead of being rectangular the box may be triangular, pentangular, or of any other polygonal shape.

The walls of the box and the flanges of the lid and bottom may have projections on one part adapted to enter apertures in the other part. These may take the form of concavo-convex indentations, marked 03 and f respectively, (Figs. 3 to 8) forthe purpose of engaging each other. Fig. 5 shows the indentations 7 made near the edges of a blank from which the lid or bottom is to be made. Figs. 6 and 7 show the same blank after being folded, the flanges being still in horizontal position. The indentations d and f are so positioned that when the lid and .bottomare placed in position on the box each indentation f engages an indentation d. This engagement, combined with the spring'y action of the flanges, makes a very firm connection, capable of resisting considerable strain without reinforcement by means of adhesive, clamps or the like.

An convenient number of engaging parts may e used; in some cases it may be Suficient to have only two places of engagement, at opposite sides of the box. In general, of course, the number required is inversely proportional to the convexity of the protuberances. The material iised for manufacture of the box may be cardboard, sheetmetal or any other material adapted for the purpose.

What I claim as my invention and desire to secure by Letters Patent of the United States is The herein described box comprising. in combination with a body of polygonal shape constructed of card-board and having adja-' cent its upper edge concavo-convex recesses,

a box head of polygonal shape formed from a single sheet of card-board and having its edge parts bentinwardly along lines parallel with and at a distance from its straight edges, and thereafter bent outwardly along lines nearer to said edges to form resilient flanges around the several sides of the head, said flanges being vdisconnected at their ends to permit them to have independent movement, and being formed. at intervals with concave-convex projections stamped in them coincident with the recesses in the box body, whereby the springy action of said flanges, together with 10 the engaged projections and recesses will retain the head upon the body. a In Witness whereof I have signed this specification in the presence of two witnesses.

FRIEDRICH ADOLF REBENTISCH. Witnesses:

L. VANDER LAUN, M. BEHNE. 

